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Anonymous

I have a 98 4L SOHC . The valve seems to be behind the intake manifold. The emissions diagram shows 2 hoses going to it. Local dealership swears Part #EV225 is correct. You would not believe how much of the internet is devoted to this situation

The PCV valve can be located in several places. The most common location is in a rubber grommet in the valve cover. It can be installed in the middle of the hose connections, as well as installed directly in the intake manifold.

Once the PCV valve is located, make sure all the PCV system hoses are properly connected and that they have no breaks or cracks.

Remove the air cleaner and inspect the air and crankcase filters. Crankcase blowby can clog these with oil. Clean or replace such filters.

Oil in the air cleaner assembly indicates that the PCV valve or hoses are plugged.

Make sure you check these and replace the valve and clean the hoses and air cleaner assembly.

When the PCV valve and hose are in satisfactory condition and there is oil in the air cleaner assembly, perform a cylinder compression test to check for worn cylinders and piston rings.

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It is under the throttle body area and it is hard to get to unless you are doing the plugs and have it out of the way. My Ford dealer quoted $166 to change the plugs P&L. I did them myself. Look up your PVC valve on rockauto.com to see what it looks like.
1. Remove the 4 transaxle roll restrictor brace bolts.
o To install, clean the bolts using a wire brush, apply new threadlocker to the threads and tighten to 55 Nm (41 lb-ft) .
2. Remove the bolt and the transaxle roll restrictor brace.
o To install, clean the bolts using a wire brush, apply new threadlocker to the threads and tighten to 48 Nm (35 lb-ft) .
3. Disconnect the positive crankcase ventilation (PCV) valve tube from the PCV valve.
4. If equipped, disconnect the PCV valve electrical connector.
5. CAUTION: A new PCV valve must be installed if removed from the cam cover. Damage will occur to the locking mechanism on the PCV valve. Rotate the PCV valve counterclockwise to remove from the valve cover.
6. To install, reverse the removal procedure

The PCV valve is located under the intake manifold on the non-hybrid 2.5L engine. The intake manifold MUST be removed in order to service the PCV valve.
The PCV valve sits in the crankcase vent oil separator.

On 3.5L engines, the PCV Valve is located on the rear valve cover (see pictures bellow). Please note: the PCV valve must be replaced if it's removed. Access to the valve is easier if you remove the upper intake manifold. However, this is not absolutely necessary and if you are already a little mechanically inclined you can do it the way you would replaced any other PCV valve.

-A 19mm open wrench will make your life a lot easier if the PCV valve is a bit tight. It is in an awkward spot to apply pressure.

-Disconnect the electrical connector from the valve. There is a small pin or locking device on the wire that you will have to slightly depress for the connector to release.

-Disconnect the hose from the valve and turn the hose clockwise so that you have a bit of room to work with.

-Turn the PCV valve counterclockwise and remove from the valve cover. Pay close attention to the position of the valve at the point when it is to be removed. The new PCV valve will go in at that same position. Why is this important? It is possible to install the PCV valve facing in the opposite direction. Once the PCV valve in and locked it in place, it damages the locking mechanism. Therefore, if you remove it you will have to throw it away and purchase a new one.

-You just saved $130 - $150 to have the PCV replaced at the dealership...

http://www.focushacks.com/images/pcv.jpgHere's a picture to locate it.. So, when looking at the engine from above, on the right of the exhaust. Procedure to replace it1) Lift and support the front end of your car, or drive up on ramps 2) Get under the front of your car. The PCV Valve is located behind the exhaust manifold, a few inches below the valve cover.3) Push up on the PCV valve to pop it out of the tube, or pull. You can get it out of the rubber tube with some effort. 4) Remove the rubber elbow from the top of the PCV valve. This can be re-used if it's not squishy. It can also be replaced cheaply. 5) Put the elbow on the new PCV Valve 6) Re-attach the elbow to the PCV tube 7) Push the new PCV valve back down into the large rubber tube